Update app.py

app.py

@@ -17,12 +17,12 @@ try:
       return reply
 except:
   print("Try Again")
-  
+custom_theme = gr.Themes(primary_hue="blue", secondary_hue="green", neutral_hue="gray")  
 reply = gr.Interface(
     fn=ChatReply,
     inputs=gr.Textbox(label="Write any term", placeholder="E.g. Flutter?"),
     outputs=gr.Textbox(label="Get a simple answer in return:"),
-    theme="Slate Yellow Dark",
+    theme=custom_theme,
     title="Explain things in simple way"
     )